MAX847
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MAX847

1 Cell, Step-Up Two-Way Pager System IC

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Complete Power Supply and Monitoring System with SPI™ Interface Simplifies Design, Saves Cost and Space

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1ku List Price Starting From $6.38
Features
  • 80mA Output from 1 Cell at 90% Efficiency
  • 13µA Idle Mode™ (coast) Current
  • Selectable Low-Noise PWM or Low-Current Operation
  • PWM Operating Frequency Synchronized to Seven Times an External Clock Source
  • Operates at 270kHz with No External Clock
  • Automatic Backup-Battery Switchover
Additional Details
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The MAX847 is a complete power-supply and monitoring system for two-way pagers or other low-power digital communications devices. It requires few external components. Included on-chip are:

  • A 1-cell input, 80mA output, synchronous-rectified boost DC-DC regulator with a digitally controlled +1.8V to +4.9V output
  • Three low-noise linear-regulator outputs
  • Three DAC-controlled comparators for software- driven 3-channel A/D conversion
  • SPI™-compatible serial interface
  • Reset and low-battery (LBO) warning outputs
  • Charger for NiCd, NiMH, lithium battery, or storage capacitor for RF PA power or system backup
  • Two 1.8Ω (typical) serial-controlled open-drain MOSFET switches

An evaluation kit for the MAX847 (MAX847EVKIT) is available to aid in design and prototyping.

Applications

  • 1-Cell Powered Handheld Equipment
  • GPS Receivers
  • Two-Way Paging
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file View Data Sheet (Rev.1a)
Documentation View All Documentation
Part Models 1
1ku List Price Starting From $6.38
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MAX847

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UPDATED 10/01/1998
English

MAX847: 1 Cell, Step-Up Two-Way Pager System IC Data Sheet (Rev.1a)

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UPDATED 01/01/1900
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MAX847: 1节电池、升压型、双向寻呼机系统电源IC Data Sheet

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UPDATED 10/01/1998
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MAX847: 1セル、ステップアップ、双方向ページャシステムIC Data Sheet (Rev.1a)

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Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX847EEI+ 28-QSOP-150_MIL external-link
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  • Reliablity Data external-link

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Mar 13, 2023

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Jan 24, 2019

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Software & Part Ecosystem

Parts Product Life Cycle Description

Product1
MAX769
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2 or 3 Cell, Step-Up/Down, Two-Way Pager System IC

Evaluation Kits 1

MAX847EVKIT

Evaluation Kit for the MAX847

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MAX847EVKIT

Evaluation Kit for the MAX847

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MAX847EVKIT
Evaluation Kit for the MAX847

Features and Benefits

  • 0.8V to 1.8V (1-cell boost) Battery Input Voltage
  • 1.8V to 4.9V Digitally Adjustable Output Voltage
  • Up to 80mA Total Output Current
  • Three Low-Noise Voltage Regulators
  • Charger for Small NiCd/NiMH/Lithium Battery or Storage Capacitor
  • 270kHz Switching Frequency
  • 15µA Idle Mode™ Current
  • Digitally Controlled 1.8Ω Switches for Vibrators, Beepers, etc.
  • Reset and Low-Battery Outputs
  • Surface-Mount Components
  • Fully Assembled and Tested
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Product Detail

The MAX847 evaluation kit (EV kit) provides a platform for evaluating the features of the MAX847. The MAX847 converts a 1-cell, 0.8V to 1.8V battery voltage to four separate output voltages. The main output voltage at OUT is digitally controlled from 1.8V to 4.9V in 100mV steps by a 3-wire SPI™ serial interface. OUT provides up to 80mA. The other outputs (REG1, REG2, and REG3) are low-noise linear-regulator outputs. The MAX847 offers numerous features for two-way paging and other low-power wireless designs. Consult the MAX847 data sheet for details. The MAX847 EV kit is a fully assembled and tested surface-mount circuit board.

The MAX769 is similar to the MAX847 except that it contains a buck/boost DC-DC converter (for 2-cell or 3-cell inputs) rather than a boost-only converter (for 1-cell inputs). To evaluate the MAX769, please order the MAX769EVKIT.

Applications

  • 1-Cell Powered Handheld Equipment
  • GPS Receivers
  • Two-Way Paging

Evaluation Kits1

MAX847EVKIT

Evaluation Kit for the MAX847

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